a
Department of Chemistry, University of South Florida, 4202 E. Fowler Avenue, Tampa, USA
E-mail: sqma@usf.edu
;
Fax: +1-813-974-3203
;
Tel: +1-813-974-5217
b
Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, USA
c
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, People's Republic of China